test for all models in ActivityStreamSerializer

awx/main/tests/unit/api/serializers/test_activity_stream_serializer.py

@@ -0,0 +1,31 @@
+from awx.api.serializers import ActivityStreamSerializer
+from awx.main.registrar import activity_stream_registrar
+from awx.main.models import ActivityStream
+
+from awx.conf.models import Setting
+
+
+def test_activity_stream_related():
+    '''
+    If this test failed with content in `missing_models`, that means that a
+    model has been connected to the activity stream, but the model has not
+    been added to the activity stream serializer.
+
+    How to fix this:
+    Ideally, all models should be in awx.api.serializers.SUMMARIZABLE_FK_FIELDS
+
+    If, for whatever reason, the missing model should not generally be
+    summarized from related resources, then a special case can be carved out in
+    ActivityStreamSerializer._local_summarizable_fk_fields
+    '''
+    serializer_related = set(
+        ActivityStream._meta.get_field(field_name).related_model for field_name, stuff in
+        ActivityStreamSerializer()._local_summarizable_fk_fields
+        if hasattr(ActivityStream, field_name)
+    )
+    
+    models = set(activity_stream_registrar.models)
+    models.remove(Setting)
+
+    missing_models = models - serializer_related
+    assert not missing_models